font resize excess sometimes causes an OpenGL (texture related) error

[christianparpart]

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How to reproduce

spawn Contour from another instance to see error log output, then spam resize font size (best done via modifier + mouse wheel binding) until you see the GL errors printed. If you are lucky, you stop scrolling right when that was happening and then you see what i posted in the screenshot.

The interim fix is to simply continue resizing, as the next resize will work again. But why we get this error in the first place, while it usually is working, that is to be investigated.

I consider this non-critical, because you can trivially fix it be font-resizing again (or up and back down again), but it should still be fixed.

Screenshot

Atlas Texture